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A251053
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Number of (n+1)X(6+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements
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1
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12858, 56676, 114512, 262200, 521785, 1081183, 2129846, 4324677, 8753870, 18288333, 38813329, 84501947, 186769920, 419036143, 948331795, 2161174028, 4944248898, 11342696102, 26060422110, 59935245973, 137914961855
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OFFSET
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1,1
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COMMENTS
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LINKS
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FORMULA
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Empirical: a(n) = 8*a(n-1) -25*a(n-2) +35*a(n-3) -7*a(n-4) -49*a(n-5) +77*a(n-6) -55*a(n-7) +20*a(n-8) -3*a(n-9) for n>12
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EXAMPLE
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Some solutions for n=3
..0..0..0..0..0..0..1....3..3..3..3..3..3..3....0..0..0..0..3..0..3
..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..3..0..3
..0..0..0..0..0..0..0....2..0..0..0..0..0..0....0..0..0..0..3..0..3
..1..1..1..1..0..0..0....2..0..0..0..0..0..0....1..1..0..0..3..0..3
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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